Ball-cock.



Patented July I, I902. C. BIRKEBY.

BALL 000K.

(Application filed Feb. 15, 1902.) (No Model.) 2 Sheets-Sheet I.

I 'wibme/sola No. 703,521. Patented luly l, I902 C. BIBKEBY.

BALL COCK.

(Application filed Feb. 1 5. 1902.) 1

(No Model.) 2 Sheets-Sheet 2.

mveutoe mHMe/awa g E V Q r V .01. 61min:

UNITED STATES PATENT OFFICE.

CORNELIUS BIRKERY, OF HARTFORD, CONNECTICUT.

BALL-COCK.

SPECIFICATION forming part of Letters Patent No. 703,521, dated July 1, 1902.

Applicationfiled February 15, 1902. Serial No, 941193. (No model.)

To aZZ whom it may concern-.-

Be it known that I, CORNELIUS BIRKERY, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain-new and useful Improvements in'Ball-Cocks, of which the following is a specification.

This invention relates to a cock which is automatically opened and closed by the falling and rising of a float located in a tank in which it is desired to maintain a constant supply of water.

The object of this invention is to provide a cock of this nature with simple means whereby an unbalanced valve of relatively large area may be used in a high-pressure system and satisfactorily closed and opened with a comparatively small float. This object is attained by pivoting the float-lever to the outer end of the pivoted valve-spindle lever and providing the short arm of the float-lever with a roller that is adapted to roll on an inclined surface formed on the casing as the float 'falls and rises with the change of water-level,

and thus efiect a powerful leverage upon the valve spindle-lever for controlling the movements of the valve.

Figure l of the accompanying drawings shows a central section of a top supply ballcock with the valve arranged to shut against the pressure and provided with the improved operating means. I of a bottom supply ball-cock with the valve adapted to shut against the pressure and provided with the improved operating means. I Fig. 3 is a central section of a top supplyball-cock with the valve adapted to close with the pressure and provided with the improved 1 operating means. Fig. 4 is a View of a modified form of the invention, and Fig. 5 is a View of still another modification.

and the bottom supply-cock (shown in Fig. 2) the valve-seat 4 is formed on the end 0f the body 5, and the valve 6 on the end of the valve-spindle 7 is movable in the chamber 8 in the casing 9 on the outlet side of the seat. In this form the valve closes against the pressure and opens with the pressure of the water in the body, and if the pressure against the face of the valve is high it requires con- Fig. 2 is aside elevation 1 surface 15, that is formed on the front of the outlet-bib 16.

When the float dropsas water is drawn from the tank in which it is located, the roller rides up on the incline and allows the pressure of the water to force open the valve. As the water enters the tank and the float rises the roller rides down the incline and causes the float-lever to force the valve shut. By reason of the relative proportions of the arms of the levers and the pitch of the incline the leverage on the outer end of the spindle-lever is very strong, so that the valve may be easily closed and held tightly shut with a comparativelyv small float, although the pressure may be high.

In the form shown in Fig. 3 the valve 17 on the end of the spindle 18 is movable in the chamber 19 in the body 20 on the pressure side of the seat. In this case the valve closes with the pressure and opens against the pressure of the water in the body, and if the pressure is high considerable force is required to open the valve. In this form the incline 21 is arranged reversely, so that when the float drops the roller 22 rides up on the incline and forcing out the end of the floatlever easily pushes the valve open against high pressure. When the float rises, the roller rides down the incline and allows the pressure In the top supply-cock (shown in Fig. 1)

and the float to draw the valve closed and hold it shut.

In the form shown in Fig. i the float-lever 23 is pivoted between lugs projecting from the outlet-bib, and the inclined surface 2% is formed on this float-lever. In this case the roller 25is carried by the lower end of the spindle-lever 26. .When the float of this form rises, the incline rises and through the roll forces outwardly the outer end of the spindle-lever, and thus closes the valve. When the float drops, the incline moves downwardly and frees the outer end of the spindlelever, so that the pressure of the Water may open the valve.

In the form shown in Fig. 5 the float-lever 27 is pivoted between lugs projecting from the outlet-bib and the outer end of the spindle-lever 28 extends through an opening in the float-lever. In thiscase the incline is on the edge of the spindle-lever and the roller 29 is carried by the float-lever. WVhen the float rises, the roll engages the outer end of the float-lever and closes the valve. WVhen the float drops, the outer end of the spindle-lever is freed, so that the pressure of the Water may open the valve.

I claim as my invention 1. A hall-cock having a valve-spindle, a spindle-lever engaging the valve-spindle, a float-lever pivoted to the spindle-lever, and an incline on the casing with the short arm of the float-lever engaging the incline, substantially as specified.

2. A ball-cock having a valvespindle, a spindle-lever engaging the valve-spindle, a float-lever pivoted to the spindle-lever, a roller carried by the short arm of the floatlever, and an incline on the casing against 1 which the roller runs when the float rises and drops, substantially as specified.

3. A ball-cock having a valve-spindle, a spindle-lever engaging the valve-spindle, a float pivoted to the spindle-lever, and a surface inclining away from the inner end of the spindle-lever and engaged by the short arm of the float-lever so that the lifting of the float causes the outer end of the float-lever to be forced away from the inclined surface, substantially as specified.

'45. A ball-cock having a valve-spindle, a spindle-lever pivoted to the casing and having the inner arm on one side of the pivot engaging the valve-spindle, a pivoted float-lever engaging the casing also the outer arm on the other side of the pivot of the spindle-lever, an incline and a roller, the said roller and incline so engaged that when the level of the float changes the outer end of the spindlelever is moved powerfully by the float-lever and the inner end of the spindle-lever caused to engage the spindle for moving the valve against the water-pressure, substantially as specified.

CORNELIUS BIRKERY.

Witnesses:

II. R. WILLIAMS, V. R. IIoLcoMB. 

